LEARN · EXPLAIN · REVISE

How many subsets does A have?

Read the idea, work independently, then explain what changed.

TOPIC 01

Sets and commonly used logic: mixed assessment

A mixed assessment: identify the method, justify it and revise your reasoning.

Use one hint at a time. A correction explains what changed, not just the final answer.

01 / Standard#Your turn

|A|=10

Skills and prerequisite lessons

Working and explanation

BUILD THE REASONING

Hint 1

Apply the element-by-element definition of inclusion.

Hint 2

Each element may be included or omitted.

Worked solution

The requested value is 1024.

Checks and common pitfalls: The empty set and the full set both count.

Think first. Reveal a hint when the class is ready.

Teacher preparation and assessment